The old implementation of Table.Set in wasm-js.cc accessed information
which should be hidden from this level of abstraction, e.g. the internal
structure of a WasmTableObject. With this CL, all that is done in
wasm-js.cc is the extraction of parameters. The actual logic is happening
in wasm-module.{h|cc}. This CL will also make refactoring wasm-module.cc
easier.

R=clemensh@chromium.org, mtrofin@chromium.org

Change-Id: Ifbce6f739459dffc9f9d47e4cd8227638867f3e9
Reviewed-on: https://chromium-review.googlesource.com/525694
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45754}